Subsoil plow



April 1929. E. A. KREBS ET AL SUBSOIL PLOW Filed May '7, l928 52 W72 fa rs.

@M #7,; fried Patented Apr. '30, 1929;

warren; STATES PATENT'IOFFICE.

EWALD ARTHUR KREBS D FRANZ ALFRED KREBS, OF OBERELSDORF, GERMANY.

Application filed May 7, 1928, Serial No.

SUBSOI L PLOW.

This invention relates to a subsoil plow and consists in arranging a subsoil share at each end of a vertical longitudinally adjust I able bar which is mounted vin guides behind the main plow share and controlled by a pivotally supported hand lever whereby it can be raised and lowered, means being provided for-securing the hand lever and sub soil share in adjusted position.

The small subsoil share will add but little to the resistance of the plow, while the loosening of the subsoil obtained by the use of the share, will have a very beneficial influence on the plant growth.

Fig. 1 of the accompanying drawings represents a perspective view of the entire arrangement, and

nism.

Fi 2 is a. view of the oaeratin mechab v C) The plow frame has parallel members 1 and 5 to which, behind the main plow share 2, brackets 8 and 9 are connected. Saddle pieces 10 and 11 on said brackets serve as'guides for a Vertical bar 12 to the ends of which subsoil shares 13 and 14; are

connected. hand lever bar and at 'The bar 12 is controlled by a 16 which is pivoted at to the 17 to a bridge piece 4, the latter 275,827, and in Germany March 21, 1923.

being secured by screws 7, at one end to the frame member 5 and at the other end to a frame member The hand lever can be operated for raising and lowering thesubsaid hand lever together with the bar in different positions. 1 r 2. In a plow, a Vertical, longitudinally adjustable bar arranged behind the main 7 plow share, a subsoil share connected to each end of said bar, a pivotally supported hand lever connected to said bar for the acljustn'ient thereof, a rigidly supported rack arranged parallel to said bar, and means enabling the hand lever to engage said rack for securing the bar in ditlerent elevations.

' EWALD ARTHUR-Items.

FRANZ ALFRED KREBS. 

